Cooling unit



Nov. 27, 1934. H. A. GREENWALD I 1,

- COOLING UNIT Filed June l5, 1931 2 Sheets-Sheet 1 INVENTOR ATTORNEY:

Nov. 27, 1934. H. A. GREENWALD 1,982,429

COOLING UNIT Filed June 15, 1951 2 Sheets-Sheet 2 INVENTOR ATTORNEYS Patented Nov. 27, 11934 I I i UNITED STATES PATENT OFFICE COOLING UNIT Harold A; Greenwald, Detroit, men, assignor, by mesne assignments, to Kelvinator Corporation, Detroit, Mich., a corporation of Michigan Application June 15, 1931, Serial No. 544,667 8 Claims. (01. 62-126) This invention relates generally to refrigeratnected by suitable tubing 11 to the compressor C ing apparatus, particularly to the cooling units and condenser D. Thus in this construction the thereof, and consists of certain novel features of expansion coils 10 carry the'pressure of the reconstruction, combinations and arrangements frigerant, and the corrugations 8 provide the of parts that will be hereinafter more fully derequired amount of heat absorption surface in a 60 scribed and particularly pointed out in the aprelatively small space. Y pended claims From the foregoing it will be apparent that the In the accompanying drawings: bodies 1 and 1f respectively of the units A and Figure l is a diagrammatic view of a refrig- A are identical and may be made by the same erating apparatus of the high side flooded type set of tools. When used in 'the expansion valve 65 and showing a cooling unit embodying my invensystem the corrugated shells of the body provide tion as a part thereof; the proper heat absorption surface in a small Figure 2 is a front elevation of the cooling space, and when used in the flooded type system unit illustrated in Figure 1; such corrugations also provide the proper strength Figure 3 is a vertical sectional view through and rigidity to resist deformation due to the pres- 70 the cooling unit; sure of the refrigerant. In both constructions the Figure 4 is a diagrammatic view of refrigeratinner shell constitutes a support and housing for ing apparatus of the expansion valve type; the ice trays or receptacles containing fluids to Figure 5 is a front elevation of the cooling be frozen. It will be noted that the material unit illustrated in Figure 4; of the inner shell is relatively wide between the 75 Figure 6 is a vertical sectional view through corrugations, wider than the corrugations, so as the'cooling unit illustrated in Figure-5. to provide a large flat heat absorbing surface for Referring to Figures 1 to 3 inclusive wherein the ice tray or trays supported thereon.

refrigerating apparatus of the high side flooded While it is believed that from the foregoing type is illustrated, A is a cooling unit embodying description the nature and advantages of the 0 my invention; B is a float chamber; C is a cominvention will be readily apparent. I desire to pressor, and D is a condenser, all being connected have it understood that I do not limit myself to together by suitable tubing and forming a closed whatis herein shown or described and that such circuit for the refrigerant. As shown, the unit changes may be resorted to when desired as fall A projects forwardly from an upright panel E within the scope of what is claimed. 85

and has a body 1 comprising concentric sheet .WhatIclaim as my invention is: metal shells 2 and 3. Preferably these shells 2- 1. An evaporator for a refrigerating system, and 3 are corrugated and are secured together comprising in combination, a plurality of conat their opposite ends. In the present instance centric'shells joined at either ends with the interthe inner shell 2 is provided at its opposite ends mediate portions thereof spaced from one another 9 with laterally projecting flanges i and 5 respecto provide a closed chamber for a refrigerating tively of substantially L cross section, while the medium, the inner of said shells having narrow outer shell 3 is sleeved upon and is welded to the downwardly extending corrugations at the botbases 6, and '7 respectively of said flanges. Thus tom thereof and the material between said cor- 40 a chamber F is provided between the shells for rugations being wider than said corrugations t the reception of the refrigerant and the corruprovide a large heat absorbing surface for supgations 8 afford the proper strength and rigidity porting an ice tray.

to resist deformation due to the pressure of the 2. An evaporator for a refrigerating system, refrigerant. comprising in combination, a plurality of con-,

45 Re er g to Figures 4 t0 6 inclusive wherein centric shells joined at either ends with the interfri r n apparatus of he expansion valve 'mediate portions thereofspaced from one anyp i ill is e c oling unit embodyother to provide a closed chamber for a refrigering my inv is t expansion v v 1 ating medium, the inner of said shells having is the compressor, and D is the condenser, all narrow downwardly extending corrugations at 50 being connected by suitable tubing to form a the bottom thereof and the material between said closed circuit. In this instance the unit A is the corrugations being wider than said corrugations same as A illustrated in Figures 1 to 3 except to provide alarge heat absorbing surface for supthat brine instead of refrigerant is within the porting an ice tray, and refrigerant conveying chamber F and expansion coils 10 for the retubes in intimate metallic contact with the said 55 frigerant encircle the inner shell 2' and are conmaterial,

3. An evaporator for a refrigerating system,

. comprising in combination, a plurality of concentric shells joined at either ends with the intermediate portions thereof spaced from one another to provide a closed chamber for liquid refrigerant, the inner of said shells having downwardly extending corrugations at the bottom thereof projecting into the liquid refrigerant and I the material between said corrugations being wider than said corrugations to provide a large heat absorbing surface for supporting an ice tray.

4.'An evaporator for a refrigerating system, comprising in combination, a plurality of concentric shells joined at either ends with the intermediate portions thereof spaced from one another to provide a closed chamber for a refrigerating medium, the inner of said shells having corrugations projecting outwardly into the refrigerating medium and the corrugations at the bottom being narrower than the material between adjacent corrugations, said material between the corrugations providing a large flat heat absorbing surface for supporting an ice tray. I

5. In a refrigerating system, an evaporator providing a largeheat absorbing surface for supporting an ice tray and outwardly extending heat absorbing surface for cooling circulating air, comprising in combination, a pair of concentric shells joined at either ends with the intermediate portions thereof spaced from one another to provide a closed chamber for a refrigerating medium, the intermediate portions of said shells having aligned outwardly projecting heat absorbing corrugations and refrigerant conveying tubes in intimate metallic contact with the material between the corrugation of the inner shell.

6. In a refrigerating system, an evaporator providing a large heat absorbing surface for supporting an ice tray and outwardly extending heat absorbing surface for cooling circulating air, comprising in combination, a pair of concentric shells joined at either ends with the intermediate portions thereof spaced from one another to provide a closed chamber for a refrigerating medium, the intermediate portions of said shells having sharp outwardly projecting fin like heat absorbing corrugations and having flat ice tray supporting portions intermediate said corrugations, said shells having upwardly extending side walls and the corrugations of said side, walls extending upwardly.

' HAROLD A. GREENWALD.

iao 

